ABSTRACT In the present study, laboratory-scale experiments and thermodynamic calculation between the mould slags and the steel were performed to investigate reaction performances of mould slags during continuous casting (CC) of 321 stainless steel. The results show that in the final Slag1 (traditional mould slag), SiO2 decreased by 3.86 wt-% and TiO2 increased by 4.85 wt-%, whereas the melting temperature, viscosity and crystallization rate increased noticeably. Perovskite (CaTiO3) and TiN were precipitated during the steel-slag reaction. Compared to Slag1, both properties and constituents of Slag2 (newly developed) with low SiO2 changed moderately, despite TiO2 in the final Slag2 increased by 3.96 wt-%. The precipitation of TiN and the reactivity between steel and slag were evaluated by the thermodynamic method. A comprehensive enthalpy change of steel-slag reaction was estimated to elucidate the formation of frozen steel or clogging based on the experimental results and the thermodynamic calculation.

中文翻译：

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不同SiO2含量结晶器渣对321不锈钢反应性能

摘要 在本研究中，进行了结晶器渣与钢之间的实验室规模实验和热力学计算，以研究结晶器渣在 321 不锈钢连铸 (CC) 过程中的反应性能。结果表明，在最终的 Slag1（传统结晶器渣）中，SiO2 减少了 3.86 wt-%，TiO2 增加了 4.85 wt-%，而熔化温度、粘度和结晶速率显着增加。钙钛矿 (CaTiO3) 和 TiN 在钢-渣反应过程中析出。与 Slag1 相比，尽管最终 Slag2 中的 TiO2 增加了 3.96 wt%，但具有低 SiO2 的 Slag2（新开发的）的性质和成分都发生了适度的变化。TiN的析出和钢与渣之间的反应性通过热力学方法进行评价。